Magento Observer not being called on order payment pay

UPDATED 05/08/2011 *

I am new to magento and trying to create an observer that will be triggered upon the payment of an order. For now the observer just sends an email however i will be extending upon this in the future, however i need to get the code working first.

I am using Magento 1.5.1.0 and having looked at the event hooks cheatsheat @ http://www.nicksays.co.uk/magento_events_cheat_sheet/ i can see that the event i want to hook onto is

'sales_order_payment_pay'

that is dispatched from

'app/code/local/Mage/Sales/Model/Order/Payment.php'.

as i have overwitten the file in the core folder

After reading numerous articles i understand i need to create 3 files which are as follows

1. app/etc/modules/PackageName_ModuleName.xml - > contains the xml file stating where the module can be found

2. app/code/local/PackageName/ModuleName/etc/config.xml -> which attaches the observer to the dispatched 'sales_order_payment_pay' event

3. app/code/local/PackageName/ModuleName/Model/Observer.php -> consists of a class which contains a method that is called by config.xml when the 'sales_order_payment_pay event is fired.

Here are the files i have created and the directory's the files live in, the code will be extended to do more than send an email when 'sales_order_payment_pay' is triggered, i am just debugging at the minuite.

My code is as follows, No email is being recived on payment of orders

app/etc/modules/Juno_Sales.xml

<?xml version="1.0"?>
<config>
    <modules>
        <Juno_Finalise>
            <active>true</active>
            <codePool>local</codePool>
  开发者_如何转开发      </Juno_Finalise>
    </modules>
</config>

app/code/local/Juno/Sales/etc/config.xml

 <?xml version="1.0" encoding="UTF-8"?>
<config>
    <modules>
        <Juno_Sales>
                <version>0.1.0</version>
        </Juno_Sales>
    </modules>
    <global>
        <models>
            <junofinalise>
                <class>Juno_Sales_Model</class>
            </junofinalise>
        </models>          
        <events>
                <sales_order_payment_pay>
                <observers>
                        <juno_sales_order_observer>
                                <type>singleton</type>
                                <class>junofinalise/order_observer</class>
                                <method>finaliseJunoOrder</method>
                        </juno_sales_order_observer>
                </observers>
                </sales_order_payment_pay>     
        </events>
     </global>
</config>

app/code/local/Juno/Sales/Model/Order/Observer.php

 <?php
Mage::log(__FILE__);

class Juno_Finalise_Model_Order_Observer
{

    public function finaliseJunoOrder($event)
    {
         mail('ian.cassidy1404@gmail.com','call_juno_api','now call juno api');

        /*
                Sale has now been processed and is paid for, function needs modifying to call juno api 
        */


    }

}

?>

Any help would be much appreciated.

Many thanks

Ian

Your class Juno_Finalise_Model_Observer should be Juno_Finalise_Model_Order_Observer.